element, compound, mixture, bonding review find more quiz review material at:
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Element, Compound, Mixture, Bonding ReviewFind more quiz review material at: www.mrkowalik.com/chemistry
Vocabulary
• Element: a pure chemical substance consisting of one type of atom (carbon)
• Compound: 2 or more elements chemically bonded together.• Mixture: 2 or more elements combined, not bonded• Molecule: 2 or more atoms joined together (like a compound)
but can include single types of elements• H2 (Molecular Hydrogen)
• N2 (Molecular Nitrogen)
• H2O (Molecule of Water)
- Molecule is the smallest bit of a substance
Examples
Mixture, Element or Compound?
• C12H22O11 Compound
• Lemonade Mixture• Oxygen Element• Car Exhaust Mixture• Ammonia Compound
Maintaining Ratios
• Fact: Water is H2O
• Fact: Lots of water is lots of “H2O”s
• Fact: H10O5 has the same ratio
• Fact: H10O5 is not water
• Fact 5H2O is lots of water
Yummy Poisonous Explosive French Fries
• Elements do not maintain their original chemical characteristics when combined to create a compound.
Sodium Chloride
Change
Physical
• Break or Cut• Does not change the
substance• Does not break bonds
Chemical
• Creates a new substance• Breaks Chemical Bonds• Heat, Acids
Nitrogen- 5 valence electronsHydrogen- 1 valence electrons
The single Hydrogen electrons bond to the 3 singleNitrogen electrons.
Don’t forget to record the Protons and Neutrons in the nucleus…
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